As part of our workflow we produce caption information that is applied to every image during import. To ensure the quality of these captions we draft them using Microsoft Word (reasons include spell check capability, visibility, etc.). We then copy and paste these captions into the metadata preset caption field.

The problem we are encountering is that LR truncates any text that follows a carriage return. For example:

Date: 01/Jan/2015

Pictures from event taken at some place at some time.

Photo by: Phil the Photog

When copied from Word or Notepad, or similar software only has the following in the caption field after import:

Date:01/Jan/2015

This is problematic as it means we have to add a step to workflow on the backend. My research shows that this is only a problem on Windows machine.

You could work around this (tediously) by editing the preset file directly. Do Edit > Preferences > Presets > Show Lightroom Presets Folder. In Windows File Explorer, double-click the Lightroom folder, then the Metadata Presets folder. Your presets are saved here. Edit a preset in Notepad, and change the caption value to a multiline value. Here's an example of a 3-line caption: